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        <h1 id="springboot整合mybatis"><a href="#springboot整合mybatis" class="headerlink" title="springboot整合mybatis"></a>springboot整合mybatis</h1><p><strong>简介</strong></p>
<p>mybatis是一款优秀的<strong>持久层框架</strong>，它支持自定义 SQL、存储过程以及高级映射。MyBatis 免除了几乎所有的 JDBC 代码以及设置参数和获取结果集的工作。MyBatis 可以通过简单的 XML 或注解来配置和映射原始类型、接口和 Java POJO（Plain Old Java Objects，普通老式 Java 对象）为数据库中的记录。</p>
<a id="more"></a>



<p><strong>github地址：<a target="_blank" rel="noopener" href="https://github.com/mybatis/">https://github.com/mybatis/</a></strong></p>
<h2 id="1、依赖注入"><a href="#1、依赖注入" class="headerlink" title="1、依赖注入"></a>1、依赖注入</h2><blockquote>
<p>由于mybatis是第三方的，springboot没有内置，所以需要自己添加配置pom</p>
</blockquote>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">&lt;!--        mybatis--&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.mybatis.spring.boot<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>mybatis-spring-boot-starter<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line">            <span class="tag">&lt;<span class="name">version</span>&gt;</span>2.1.4<span class="tag">&lt;/<span class="name">version</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br></pre></td></tr></table></figure>


<p>添加pom配置后，查看maven依赖：</p>
<p><img src="https://gitee.com/goatyyc/giteep-page-imgs/raw/master/imgs/20210310154915.png" alt="image-20210309162723322"></p>
<p>看到mybatis引入的相关依赖有：jdbc、mybatis、mybatis-spring</p>
<h2 id="2、mybatis配置"><a href="#2、mybatis配置" class="headerlink" title="2、mybatis配置"></a>2、mybatis配置</h2><h3 id="（1）数据库默认配置"><a href="#（1）数据库默认配置" class="headerlink" title="（1）数据库默认配置"></a>（1）数据库默认配置</h3><p><img src="https://gitee.com/goatyyc/giteep-page-imgs/raw/master/imgs/20210310154916.png" alt="image-20210309215333717"></p>
<h3 id="（2）mybatis配置流程"><a href="#（2）mybatis配置流程" class="headerlink" title="（2）mybatis配置流程"></a>（2）mybatis配置流程</h3><h4 id="新建pojo实体类"><a href="#新建pojo实体类" class="headerlink" title="- 新建pojo实体类"></a>- 新建pojo实体类</h4><p><img src="https://gitee.com/goatyyc/giteep-page-imgs/raw/master/imgs/20210310154917.png" alt="image-20210309215810303"></p>
<h4 id="新建mapper接口类"><a href="#新建mapper接口类" class="headerlink" title="- 新建mapper接口类"></a>- 新建mapper接口类</h4><p><img src="https://gitee.com/goatyyc/giteep-page-imgs/raw/master/imgs/20210310154918.png" alt="image-20210309220045063"></p>
<p>也可以通过另外一种方式：不加@Mapper注解，而在Application文件主类加注解@MapperScan（“xxx”）</p>
<h4 id="resources下新建mapper文件夹"><a href="#resources下新建mapper文件夹" class="headerlink" title="- resources下新建mapper文件夹"></a>- resources下新建mapper文件夹</h4><p>在文件夹下建立对应使用类的xml文件，用于写相关的sql语句</p>
<p><img src="https://gitee.com/goatyyc/giteep-page-imgs/raw/master/imgs/20210310154919.png" alt="image-20210309220915448"></p>
<h4 id="properties整合mybatis"><a href="#properties整合mybatis" class="headerlink" title="- properties整合mybatis"></a>- properties整合mybatis</h4><hr>


<p><strong>目的是让mapper文件被识别到</strong></p>
<p><img src="https://gitee.com/goatyyc/giteep-page-imgs/raw/master/imgs/20210310154920.png" alt="image-20210309221201252"></p>
<h4 id="整合完成，编写测试"><a href="#整合完成，编写测试" class="headerlink" title="- 整合完成，编写测试"></a>- 整合完成，编写测试</h4><p>以上步骤便整合好了mybatis，现在可以在service层编写业务，然后再controller中编写调用方法了</p>
<p>这里测试业务比较简单，所以在controller中直接编写测试：</p>
<p><img src="https://gitee.com/goatyyc/giteep-page-imgs/raw/master/imgs/20210310154921.png" alt="image-20210309221648231"></p>
<h3 id="（3）整理思路"><a href="#（3）整理思路" class="headerlink" title="（3）整理思路"></a>（3）整理思路</h3><h4 id="step1：依赖注入"><a href="#step1：依赖注入" class="headerlink" title="step1：依赖注入"></a>step1：依赖注入</h4><h4 id="step2：配置文件"><a href="#step2：配置文件" class="headerlink" title="step2：配置文件"></a>step2：配置文件</h4><h4 id="step3：mybatis配置"><a href="#step3：mybatis配置" class="headerlink" title="step3：mybatis配置"></a>step3：mybatis配置</h4><h4 id="step4：编写sql"><a href="#step4：编写sql" class="headerlink" title="step4：编写sql"></a>step4：编写sql</h4><h4 id="step5：业务层（service）调用dao层"><a href="#step5：业务层（service）调用dao层" class="headerlink" title="step5：业务层（service）调用dao层"></a>step5：业务层（service）调用dao层</h4><h4 id="step6：controller层调用service层"><a href="#step6：controller层调用service层" class="headerlink" title="step6：controller层调用service层"></a>step6：controller层调用service层</h4>
      
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              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#springboot%E6%95%B4%E5%90%88mybatis"><span class="nav-text">springboot整合mybatis</span></a><ol class="nav-child"><li class="nav-item nav-level-2"><a class="nav-link" href="#1%E3%80%81%E4%BE%9D%E8%B5%96%E6%B3%A8%E5%85%A5"><span class="nav-text">1、依赖注入</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#2%E3%80%81mybatis%E9%85%8D%E7%BD%AE"><span class="nav-text">2、mybatis配置</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#%EF%BC%881%EF%BC%89%E6%95%B0%E6%8D%AE%E5%BA%93%E9%BB%98%E8%AE%A4%E9%85%8D%E7%BD%AE"><span class="nav-text">（1）数据库默认配置</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#%EF%BC%882%EF%BC%89mybatis%E9%85%8D%E7%BD%AE%E6%B5%81%E7%A8%8B"><span class="nav-text">（2）mybatis配置流程</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#%E6%96%B0%E5%BB%BApojo%E5%AE%9E%E4%BD%93%E7%B1%BB"><span class="nav-text">- 新建pojo实体类</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#%E6%96%B0%E5%BB%BAmapper%E6%8E%A5%E5%8F%A3%E7%B1%BB"><span class="nav-text">- 新建mapper接口类</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#resources%E4%B8%8B%E6%96%B0%E5%BB%BAmapper%E6%96%87%E4%BB%B6%E5%A4%B9"><span class="nav-text">- resources下新建mapper文件夹</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#properties%E6%95%B4%E5%90%88mybatis"><span class="nav-text">- properties整合mybatis</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#%E6%95%B4%E5%90%88%E5%AE%8C%E6%88%90%EF%BC%8C%E7%BC%96%E5%86%99%E6%B5%8B%E8%AF%95"><span class="nav-text">- 整合完成，编写测试</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#%EF%BC%883%EF%BC%89%E6%95%B4%E7%90%86%E6%80%9D%E8%B7%AF"><span class="nav-text">（3）整理思路</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#step1%EF%BC%9A%E4%BE%9D%E8%B5%96%E6%B3%A8%E5%85%A5"><span class="nav-text">step1：依赖注入</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#step2%EF%BC%9A%E9%85%8D%E7%BD%AE%E6%96%87%E4%BB%B6"><span class="nav-text">step2：配置文件</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#step3%EF%BC%9Amybatis%E9%85%8D%E7%BD%AE"><span class="nav-text">step3：mybatis配置</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#step4%EF%BC%9A%E7%BC%96%E5%86%99sql"><span class="nav-text">step4：编写sql</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#step5%EF%BC%9A%E4%B8%9A%E5%8A%A1%E5%B1%82%EF%BC%88service%EF%BC%89%E8%B0%83%E7%94%A8dao%E5%B1%82"><span class="nav-text">step5：业务层（service）调用dao层</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#step6%EF%BC%9Acontroller%E5%B1%82%E8%B0%83%E7%94%A8service%E5%B1%82"><span class="nav-text">step6：controller层调用service层</span></a></li></ol></li></ol></li></ol></li></ol></div>
            

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